/* Determine a canonical name for the current locale's character encoding.
- Copyright (C) 2000-2001 Free Software Foundation, Inc.
+ Copyright (C) 2000-2006, 2008-2009 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or modify it
- under the terms of the GNU Library General Public License as published
- by the Free Software Foundation; either version 2, or (at your option)
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- USA. */
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, write to the Free Software Foundation,
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
-/* Written by Bruno Haible <haible@clisp.cons.org>. */
+/* Written by Bruno Haible <bruno@clisp.org>. */
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
+#include <config.h>
-#if HAVE_STDDEF_H
-# include <stddef.h>
-#endif
+/* Specification. */
+#include "localcharset.h"
+#include <stddef.h>
#include <stdio.h>
-#if HAVE_STRING_H
-# include <string.h>
-#else
-# include <strings.h>
-#endif
-#if HAVE_STDLIB_H
-# include <stdlib.h>
+#include <string.h>
+#include <stdlib.h>
+
+#if defined __APPLE__ && defined __MACH__ && HAVE_LANGINFO_CODESET
+# define DARWIN7 /* Darwin 7 or newer, i.e. MacOS X 10.3 or newer */
#endif
#if defined _WIN32 || defined __WIN32__
-# undef WIN32 /* avoid warning on mingw32 */
-# define WIN32
+# define WIN32_NATIVE
#endif
-#ifndef WIN32
+#if defined __EMX__
+/* Assume EMX program runs on OS/2, even if compiled under DOS. */
+# ifndef OS2
+# define OS2
+# endif
+#endif
+
+#if !defined WIN32_NATIVE
# if HAVE_LANGINFO_CODESET
# include <langinfo.h>
# else
-# if HAVE_SETLOCALE
+# if 0 /* see comment below */
# include <locale.h>
# endif
# endif
-#else /* WIN32 */
+# ifdef __CYGWIN__
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+# endif
+#elif defined WIN32_NATIVE
# define WIN32_LEAN_AND_MEAN
# include <windows.h>
#endif
+#if defined OS2
+# define INCL_DOS
+# include <os2.h>
+#endif
+
+#if ENABLE_RELOCATABLE
+# include "relocatable.h"
+#else
+# define relocate(pathname) (pathname)
+#endif
+
+/* Get LIBDIR. */
+#ifndef LIBDIR
+# include "configmake.h"
+#endif
+
+#if defined _WIN32 || defined __WIN32__ || defined __CYGWIN__ || defined __EMX__ || defined __DJGPP__
+ /* Win32, Cygwin, OS/2, DOS */
+# define ISSLASH(C) ((C) == '/' || (C) == '\\')
+#endif
#ifndef DIRECTORY_SEPARATOR
# define DIRECTORY_SEPARATOR '/'
# define ISSLASH(C) ((C) == DIRECTORY_SEPARATOR)
#endif
+#if HAVE_DECL_GETC_UNLOCKED
+# undef getc
+# define getc getc_unlocked
+#endif
+
/* The following static variable is declared 'volatile' to avoid a
possible multithread problem in the function get_charset_aliases. If we
are running in a threaded environment, and if two threads initialize
'charset_aliases' simultaneously, both will produce the same value,
and everything will be ok if the two assignments to 'charset_aliases'
are atomic. But I don't know what will happen if the two assignments mix. */
+#if __STDC__ != 1
+# define volatile /* empty */
+#endif
/* Pointer to the contents of the charset.alias file, if it has already been
read, else NULL. Its format is:
ALIAS_1 '\0' CANONICAL_1 '\0' ... ALIAS_n '\0' CANONICAL_n '\0' '\0' */
-static char * volatile charset_aliases;
+static const char * volatile charset_aliases;
/* Return a pointer to the contents of the charset.alias file. */
static const char *
-get_charset_aliases ()
+get_charset_aliases (void)
{
- char *cp;
+ const char *cp;
cp = charset_aliases;
if (cp == NULL)
{
-#ifndef WIN32
+#if !(defined DARWIN7 || defined VMS || defined WIN32_NATIVE || defined __CYGWIN__)
FILE *fp;
- const char *dir = LIBDIR;
+ const char *dir;
const char *base = "charset.alias";
char *file_name;
+ /* Make it possible to override the charset.alias location. This is
+ necessary for running the testsuite before "make install". */
+ dir = getenv ("CHARSETALIASDIR");
+ if (dir == NULL || dir[0] == '\0')
+ dir = relocate (LIBDIR);
+
/* Concatenate dir and base into freshly allocated file_name. */
{
size_t dir_len = strlen (dir);
else
{
/* Parse the file's contents. */
- int c;
- char buf1[50+1];
- char buf2[50+1];
char *res_ptr = NULL;
size_t res_size = 0;
- size_t l1, l2;
for (;;)
{
+ int c;
+ char buf1[50+1];
+ char buf2[50+1];
+ size_t l1, l2;
+ char *old_res_ptr;
+
c = getc (fp);
if (c == EOF)
break;
continue;
}
ungetc (c, fp);
- if (fscanf(fp, "%50s %50s", buf1, buf2) < 2)
+ if (fscanf (fp, "%50s %50s", buf1, buf2) < 2)
break;
l1 = strlen (buf1);
l2 = strlen (buf2);
+ old_res_ptr = res_ptr;
if (res_size == 0)
{
res_size = l1 + 1 + l2 + 1;
- res_ptr = malloc (res_size + 1);
+ res_ptr = (char *) malloc (res_size + 1);
}
else
{
res_size += l1 + 1 + l2 + 1;
- res_ptr = realloc (res_ptr, res_size + 1);
+ res_ptr = (char *) realloc (res_ptr, res_size + 1);
}
if (res_ptr == NULL)
{
/* Out of memory. */
res_size = 0;
+ if (old_res_ptr != NULL)
+ free (old_res_ptr);
break;
}
strcpy (res_ptr + res_size - (l2 + 1) - (l1 + 1), buf1);
if (file_name != NULL)
free (file_name);
-#else /* WIN32 */
+#else
+
+# if defined DARWIN7
+ /* To avoid the trouble of installing a file that is shared by many
+ GNU packages -- many packaging systems have problems with this --,
+ simply inline the aliases here. */
+ cp = "ISO8859-1" "\0" "ISO-8859-1" "\0"
+ "ISO8859-2" "\0" "ISO-8859-2" "\0"
+ "ISO8859-4" "\0" "ISO-8859-4" "\0"
+ "ISO8859-5" "\0" "ISO-8859-5" "\0"
+ "ISO8859-7" "\0" "ISO-8859-7" "\0"
+ "ISO8859-9" "\0" "ISO-8859-9" "\0"
+ "ISO8859-13" "\0" "ISO-8859-13" "\0"
+ "ISO8859-15" "\0" "ISO-8859-15" "\0"
+ "KOI8-R" "\0" "KOI8-R" "\0"
+ "KOI8-U" "\0" "KOI8-U" "\0"
+ "CP866" "\0" "CP866" "\0"
+ "CP949" "\0" "CP949" "\0"
+ "CP1131" "\0" "CP1131" "\0"
+ "CP1251" "\0" "CP1251" "\0"
+ "eucCN" "\0" "GB2312" "\0"
+ "GB2312" "\0" "GB2312" "\0"
+ "eucJP" "\0" "EUC-JP" "\0"
+ "eucKR" "\0" "EUC-KR" "\0"
+ "Big5" "\0" "BIG5" "\0"
+ "Big5HKSCS" "\0" "BIG5-HKSCS" "\0"
+ "GBK" "\0" "GBK" "\0"
+ "GB18030" "\0" "GB18030" "\0"
+ "SJIS" "\0" "SHIFT_JIS" "\0"
+ "ARMSCII-8" "\0" "ARMSCII-8" "\0"
+ "PT154" "\0" "PT154" "\0"
+ /*"ISCII-DEV" "\0" "?" "\0"*/
+ "*" "\0" "UTF-8" "\0";
+# endif
+
+# if defined VMS
+ /* To avoid the troubles of an extra file charset.alias_vms in the
+ sources of many GNU packages, simply inline the aliases here. */
+ /* The list of encodings is taken from the OpenVMS 7.3-1 documentation
+ "Compaq C Run-Time Library Reference Manual for OpenVMS systems"
+ section 10.7 "Handling Different Character Sets". */
+ cp = "ISO8859-1" "\0" "ISO-8859-1" "\0"
+ "ISO8859-2" "\0" "ISO-8859-2" "\0"
+ "ISO8859-5" "\0" "ISO-8859-5" "\0"
+ "ISO8859-7" "\0" "ISO-8859-7" "\0"
+ "ISO8859-8" "\0" "ISO-8859-8" "\0"
+ "ISO8859-9" "\0" "ISO-8859-9" "\0"
+ /* Japanese */
+ "eucJP" "\0" "EUC-JP" "\0"
+ "SJIS" "\0" "SHIFT_JIS" "\0"
+ "DECKANJI" "\0" "DEC-KANJI" "\0"
+ "SDECKANJI" "\0" "EUC-JP" "\0"
+ /* Chinese */
+ "eucTW" "\0" "EUC-TW" "\0"
+ "DECHANYU" "\0" "DEC-HANYU" "\0"
+ "DECHANZI" "\0" "GB2312" "\0"
+ /* Korean */
+ "DECKOREAN" "\0" "EUC-KR" "\0";
+# endif
+# if defined WIN32_NATIVE || defined __CYGWIN__
/* To avoid the troubles of installing a separate file in the same
directory as the DLL and of retrieving the DLL's directory at
runtime, simply inline the aliases here. */
cp = "CP936" "\0" "GBK" "\0"
- "CP1361" "\0" "JOHAB" "\0";
+ "CP1361" "\0" "JOHAB" "\0"
+ "CP20127" "\0" "ASCII" "\0"
+ "CP20866" "\0" "KOI8-R" "\0"
+ "CP20936" "\0" "GB2312" "\0"
+ "CP21866" "\0" "KOI8-RU" "\0"
+ "CP28591" "\0" "ISO-8859-1" "\0"
+ "CP28592" "\0" "ISO-8859-2" "\0"
+ "CP28593" "\0" "ISO-8859-3" "\0"
+ "CP28594" "\0" "ISO-8859-4" "\0"
+ "CP28595" "\0" "ISO-8859-5" "\0"
+ "CP28596" "\0" "ISO-8859-6" "\0"
+ "CP28597" "\0" "ISO-8859-7" "\0"
+ "CP28598" "\0" "ISO-8859-8" "\0"
+ "CP28599" "\0" "ISO-8859-9" "\0"
+ "CP28605" "\0" "ISO-8859-15" "\0"
+ "CP38598" "\0" "ISO-8859-8" "\0"
+ "CP51932" "\0" "EUC-JP" "\0"
+ "CP51936" "\0" "GB2312" "\0"
+ "CP51949" "\0" "EUC-KR" "\0"
+ "CP51950" "\0" "EUC-TW" "\0"
+ "CP54936" "\0" "GB18030" "\0"
+ "CP65001" "\0" "UTF-8" "\0";
+# endif
#endif
charset_aliases = cp;
STATIC
#endif
const char *
-locale_charset ()
+locale_charset (void)
{
const char *codeset;
const char *aliases;
-#ifndef WIN32
+#if !(defined WIN32_NATIVE || defined OS2)
# if HAVE_LANGINFO_CODESET
/* Most systems support nl_langinfo (CODESET) nowadays. */
codeset = nl_langinfo (CODESET);
+# ifdef __CYGWIN__
+ /* Cygwin 2006 does not have locales. nl_langinfo (CODESET) always
+ returns "US-ASCII". As long as this is not fixed, return the suffix
+ of the locale name from the environment variables (if present) or
+ the codepage as a number. */
+ if (codeset != NULL && strcmp (codeset, "US-ASCII") == 0)
+ {
+ const char *locale;
+ static char buf[2 + 10 + 1];
+
+ locale = getenv ("LC_ALL");
+ if (locale == NULL || locale[0] == '\0')
+ {
+ locale = getenv ("LC_CTYPE");
+ if (locale == NULL || locale[0] == '\0')
+ locale = getenv ("LANG");
+ }
+ if (locale != NULL && locale[0] != '\0')
+ {
+ /* If the locale name contains an encoding after the dot, return
+ it. */
+ const char *dot = strchr (locale, '.');
+
+ if (dot != NULL)
+ {
+ const char *modifier;
+
+ dot++;
+ /* Look for the possible @... trailer and remove it, if any. */
+ modifier = strchr (dot, '@');
+ if (modifier == NULL)
+ return dot;
+ if (modifier - dot < sizeof (buf))
+ {
+ memcpy (buf, dot, modifier - dot);
+ buf [modifier - dot] = '\0';
+ return buf;
+ }
+ }
+ }
+
+ /* Woe32 has a function returning the locale's codepage as a number. */
+ sprintf (buf, "CP%u", GetACP ());
+ codeset = buf;
+ }
+# endif
+
# else
/* On old systems which lack it, use setlocale or getenv. */
(like SunOS 4 or DJGPP) have only the C locale. Therefore we don't
use setlocale here; it would return "C" when it doesn't support the
locale name the user has set. */
-# if HAVE_SETLOCALE && 0
+# if 0
locale = setlocale (LC_CTYPE, NULL);
# endif
if (locale == NULL || locale[0] == '\0')
# endif
-#else /* WIN32 */
+#elif defined WIN32_NATIVE
static char buf[2 + 10 + 1];
- /* Win32 has a function returning the locale's codepage as a number. */
+ /* Woe32 has a function returning the locale's codepage as a number. */
sprintf (buf, "CP%u", GetACP ());
codeset = buf;
+#elif defined OS2
+
+ const char *locale;
+ static char buf[2 + 10 + 1];
+ ULONG cp[3];
+ ULONG cplen;
+
+ /* Allow user to override the codeset, as set in the operating system,
+ with standard language environment variables. */
+ locale = getenv ("LC_ALL");
+ if (locale == NULL || locale[0] == '\0')
+ {
+ locale = getenv ("LC_CTYPE");
+ if (locale == NULL || locale[0] == '\0')
+ locale = getenv ("LANG");
+ }
+ if (locale != NULL && locale[0] != '\0')
+ {
+ /* If the locale name contains an encoding after the dot, return it. */
+ const char *dot = strchr (locale, '.');
+
+ if (dot != NULL)
+ {
+ const char *modifier;
+
+ dot++;
+ /* Look for the possible @... trailer and remove it, if any. */
+ modifier = strchr (dot, '@');
+ if (modifier == NULL)
+ return dot;
+ if (modifier - dot < sizeof (buf))
+ {
+ memcpy (buf, dot, modifier - dot);
+ buf [modifier - dot] = '\0';
+ return buf;
+ }
+ }
+
+ /* Resolve through the charset.alias file. */
+ codeset = locale;
+ }
+ else
+ {
+ /* OS/2 has a function returning the locale's codepage as a number. */
+ if (DosQueryCp (sizeof (cp), cp, &cplen))
+ codeset = "";
+ else
+ {
+ sprintf (buf, "CP%u", cp[0]);
+ codeset = buf;
+ }
+ }
+
#endif
if (codeset == NULL)
/* The canonical name cannot be determined. */
codeset = "";
- else if (codeset[0] != '\0')
- {
- /* Resolve alias. */
- for (aliases = get_charset_aliases ();
- *aliases != '\0';
- aliases += strlen (aliases) + 1, aliases += strlen (aliases) + 1)
- if (!strcmp (codeset, aliases))
- {
- codeset = aliases + strlen (aliases) + 1;
- break;
- }
- }
+
+ /* Resolve alias. */
+ for (aliases = get_charset_aliases ();
+ *aliases != '\0';
+ aliases += strlen (aliases) + 1, aliases += strlen (aliases) + 1)
+ if (strcmp (codeset, aliases) == 0
+ || (aliases[0] == '*' && aliases[1] == '\0'))
+ {
+ codeset = aliases + strlen (aliases) + 1;
+ break;
+ }
+
+ /* Don't return an empty string. GNU libc and GNU libiconv interpret
+ the empty string as denoting "the locale's character encoding",
+ thus GNU libiconv would call this function a second time. */
+ if (codeset[0] == '\0')
+ codeset = "ASCII";
return codeset;
}
projects / gnulib.git / blobdiff